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Ontario

$101+ Cheap flights from Fresno to Ontario (FAT - ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
FAT — ONT
Jun 5 — Jun 121
Fri 6/5
Fri 6/12
1 adult, Economy
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Cheap flight deals from Fresno to Ontario

Cheapest flights from Fresno to Ontario
Explore the most affordable flight options available from Fresno to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 6, 2026.

This Kiwi.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/310:36 am
FAT
-
ONT
1 stop5h 08m
Multiple Airlines
Thu 6/1111:58 am
ONT
-
FAT
1 stop6h 02m
Multiple Airlines
Deal found 5/2$204
This Kiwi.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/162:06 pm
FAT
-
ONT
1 stop5h 45m
Multiple Airlines
Fri 6/193:34 pm
ONT
-
FAT
1 stop22h 38m
Multiple Airlines
Deal found 5/3$216
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/293:37 pm
FAT
-
ONT
1 stop16h 27m
Multiple Airlines
Fri 6/53:30 pm
ONT
-
FAT
1 stop21h 46m
Multiple Airlines
Deal found 5/1$226
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/43:31 pm
FAT
-
ONT
1 stop4h 01m
Multiple Airlines
Sun 6/711:51 am
ONT
-
FAT
1 stop25h 26m
Multiple Airlines
Deal found 5/1$256
This Kiwi.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/316:33 pm
FAT
-
ONT
1 stop20h 36m
Multiple Airlines
Sun 6/711:51 am
ONT
-
FAT
1 stop25h 26m
Multiple Airlines
Deal found 5/3$265
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/223:37 pm
FAT
-
ONT
1 stop16h 27m
Multiple Airlines
Mon 5/253:30 pm
ONT
-
FAT
1 stop21h 45m
Multiple Airlines
Deal found 5/1$285
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/53:31 pm
FAT
-
ONT
1 stop4h 01m
Multiple Airlines
Mon 6/83:30 pm
ONT
-
FAT
1 stop21h 46m
Multiple Airlines
Deal found 5/4$286
This Kiwi.com deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/132:06 pm
FAT
-
ONT
1 stop5h 45m
Multiple Airlines
Fri 6/193:34 pm
ONT
-
FAT
1 stop22h 38m
Multiple Airlines
Deal found 5/6$298

Find flight deals from Fresno to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Fresno (FAT) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$204
(Kiwi.com)

One-way from

$101
(Kiwi.com)

Popular in

August

Cheapest in

January

Average price

$579
Provider with most accurate pricing for Fresno Airterminal-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Fresno Airterminal-Ontario flights.
Search Deals
From Fresno Airterminal to Ontario
Search Deals
One-way flight from Fresno Airterminal to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Fresno to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 6, 2026.
Use the filters below to find and compare flights from Fresno to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Fri 10/30

10:40 am-2:50 pm

1 stop4h 10m

Ontario

Sun 11/1

6:30 am-3:00 pm

1 stop8h 30m

$347

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Fri 6/26

5:35 pm-11:30 pm

2 stops5h 55m

Ontario

Sun 6/28

7:00 pm-12:15 am

1 stop5h 15m

$352

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Thu 7/23

4:35 pm-12:05 am

2 stops7h 30m

Ontario

Sun 7/26

4:35 pm-11:05 pm

2 stops6h 30m

$367
Quickest round-trip

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Wed 6/3

6:40 pm-10:37 pm

1 stop3h 57m

Ontario

Thu 6/4

1:50 pm-5:28 pm

1 stop3h 38m

$369

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 6/2

6:30 am-12:12 pm

1 stop5h 42m

Ontario

Sat 6/6

1:40 pm-5:28 pm

1 stop3h 48m

$369

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Wed 6/3

6:40 pm-10:37 pm

1 stop3h 57m

Ontario

Thu 6/11

6:00 am-9:39 am

1 stop3h 39m

$387

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Sun 5/31

5:30 am-11:05 am

2 stops5h 35m

Ontario

Sun 6/7

4:35 pm-11:05 pm

2 stops6h 30m

$397

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Mon 6/1

6:40 pm-10:37 pm

1 stop3h 57m

Ontario

Sun 6/7

6:00 am-9:39 am

1 stop3h 39m

$399
Cheapest one-way

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 5/26

2:05 pm-8:04 am

1 stop17h 59m

$114

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Fri 6/26

6:54 pm-7:51 pm

1 stop24h 57m

$152

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/4

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Compare providers for flights from Fresno to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Fresno to Ontario in May.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Fresno-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Fresno-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Fresno-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Fresno-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Fresno-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Fresno to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Fresno with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Fresno to Ontario

What is the cheapest month to book a flight from Fresno to Ontario?

Currently, January is the cheapest month in which you can book a flight from Fresno to Ontario (average of $81). Flying from Fresno to Ontario in August is currently the most expensive (average of $656). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Fresno to Ontario?

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated May 6, 2026.
Peruse reviews from past customers who have flown with Southwest and United Airlines from Fresno to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,305 reviews

Overall

7.9

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
7.9
Good
4,305 reviews
Southwest
7.9
Good
4,305 reviews

Overall

7.9

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,684 reviews
Southwest
7.9
Good
4,305 reviews

Overall

7.9

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from Fresno to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Fresno to Ontario?

    Airlines like Southwest and United Airlines fly from Fresno to Ontario in about 3h 57m. The time it takes to get you to your destination can typically vary by up to 1h 58m. Fresno and Ontario are separated by a distance of 222 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Fresno to Ontario round-trip?

    Southwest, at $209, was found to be the cheapest airline from Fresno to Ontario. An alternate airline flying to your destination would be United Airlines. Southwest is priced at 46% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Fresno to Ontario that include hotel bookings?

    Yes. In addition to deals on Fresno to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Fresno to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Fresno to Ontario.

  • Can I find deals for business class flights from Fresno to Ontario?

    Yes. Cheapflights offers flight deals from Fresno to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Fresno to Ontario?

    Currently, January is the cheapest month in which you can book a flight from Fresno to Ontario (average of $81). Flying from Fresno to Ontario in August is currently the most expensive (average of $656). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 2 airlines flying from Fresno to Ontario

Discover the top 2 airlines that operate flights from Fresno to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$209Average$374FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$250Average$411FlexibilityNo cancel feeOn-time69%

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